public static void Trans3D(SharpGL.OpenGL gl_object, int x, int y)
{
//Console.Write(_RoX + ", " + _RoY + ", " + " => ");
// Create an array that will be the viewport.
//3D顯示大小
int[] viewport = new int[4];
// Get the viewport, then convert the mouse point to an opengl point.
gl_object.GetInteger(OpenGL.GL_VIEWPORT, viewport);
double[] modelview = new double[16];
gl_object.GetDouble(OpenGL.GL_MODELVIEW_MATRIX, modelview);
double[] projection = new double[16];
gl_object.GetDouble(OpenGL.GL_PROJECTION_MATRIX, projection);
float winX, winY;
winX = (x - viewport[2] / 2);
winY = (y - viewport[3] / 2); //與範例不同的是 圖形原點是左上角
//Console.Write(winX + ", " + winY + ", " + " => ");
//(posX, posY, posZ) 轉換之前的座標
/* double[] posX = new double[4];
double[] posY = new double[4];
double[] posZ = new double[4];*/
double posX = new double();
double posY = new double();
double posZ = new double();
gl_object.UnProject(x, y, 0, modelview, projection, viewport, ref posX, ref posY, ref posZ);
isNav = 1;
if (_RoX >= 165 && _RoX <= 200)
{
//if (winX * posX[0] < 0 && winY * posY[0] < 0) isNav = -1;
if (winX * posX < 0 && winY * posY < 0) isNav = -1;
}
else if (_RoX >= 45 && _RoX <= 315)
{
//if (winX * posX[0] > 0) isNav = -1;
if (winX * posX > 0) isNav = -1;
}
return;
}